Improvement in thrashing-machines



GEORGES. H-AML|N. Improvement in ThraShing-Machines. N0. 27,872,. lPatented'l'une'l,18,72,

UNITED STATEs PATENT OFFICE.

GEORGE B. HAMLIN, OF WILLIMANTIC, CONNECTICUT.

IM PROVEMENT IN THRASHlNG-MACH-lN-ES'.

Specification forming part of Letters Patent No. 127,872, dated June 11,1872.

cuted by them in a novel and a satisfactory manner 5 and I do herebydeclare that the following specification, taken in connection with thedrawing furnished and forming a part of the same, is a clear and truedescription of a machine involving my invention.`

Referring to the drawing, Figure l represents one of my machines inperspective. Fig. 2 represents the same in longitudinal verticalsection.

A denotes the thrashing-cylin der; it is mounted on a suitabledriving-shaft, and supported in a cased frame adapted to the purpose;its journal-boxes are slotted, and are capable of being adjustedlongitudinally on the frame. B denotes the concave bed 5 its interiorcurved line or face is slightly eccentric to the circumferential line ofthe cylinder. The bed may be made in sections, and each section providedwith a means for adjusting it with relation to the cylinder, or it maybe made as shown, and fixed to the frame of the machine. The innersurface of the bed is represented as corrugated in lines parallel withthe axial line of the cylinder. Instead of this form the corrugationsmay be in shortsections, and broken or separated, so as to presentsuitable resistance to the passage of the straw, Ste., during the op`eration of thrashing. Diamond-shaped projections will, bypresentingtheirseveral angles, be found of special lvalue in this connection. Simplepins or studs have also proven effective in the beds ofthrashing-machines, and are employed by me in-this instance below thecylinder, adjacent to the delivery-aperture b. C denotes, in eachinstance, an elastic beater, many of which are attached to the peripheryof the cylinder. These beaters may be' composed of rattan, whalebone, oreven steel; in the latter case it will be desirable to tip them withextensions of elastic vulcanized rubber.

In the drawing these beaters are represented as if attached to thecylinder in two different methods in alternate rowsv lengthwise of thecylinder, although the rows may be set on spiral lines instead.One-halfof the beaters are represented as if attached to the cylinder ona true tangential line, or at right angles to a vertical or radial linewhich might be drawn through the sectional axis of the cylinder. Theother half of the beaters are set at an angle of, say forty-livedegrees, or half way between the right-angled tangential line and a vtrue radial line. It is not essential that the two sets be employed, forall may be mounted at the same angle. The outer ends of the two sets ofbeaters may occupy the same general circumferential line, as shown, oreach set may have a line peculiar to itself, and so act independentlyupon the grain when interposed between them and the bed-plate withvarying degrees of force. When the cylinder revolves the several beatershave a drawing spring contact of their ends and a portion of their sideswith the straw, interposed between them and the bed, and by such contactand the contac of the frietional surface of the bed the thrashingoperation is accomplished. rlhe machine may be fed direct into themouth, or the wellknown continuous feed apron may be employed.

It will be readily understood that in thrashing-machines as heretoforeconstructed great speed has been essential to secure their properoperation. To attain and maintain high speed a very considerable amountof motive power is always requisite; with high speed follows theattendant danger of ignition by friction, of the discharge of teeth andof stones, &c., carelessly introduced, after the manner of murderousprojectiles, for it is a well-knownfact that many serious injuries andeven deaths have occurred from such causes.

It has been my aim to produce a machine which, while it would not thrashas rapidly, would operate equally as well at a low speed as at ahighrate of speed, and also one which would at the same time be well adaptedto the use of small farmers, and capable of shelling peas, beans, andother4 similar produce.

aware that wide-toothed steel plates or arms have been employed withthrashing or hullingmachine cylinders; but I am not aware that prior tomy invention elastic beaters of the character herein described have everbeen used in a similarconnection.

The thrashin g-cylinder A, provided with the several series of elasticbeaters C, set tangentially thereto, in combination with a concave bed,provided with a frictional surface, 'the two being set With relation toeach other so that the thrashing operation Will be executed by thedrawing contact of the sides and ends of the beaters and the surface ofthe bed, substantially as described.

GEORGE B. HAMLIN. Witnesses:

ELLIotI.1 B. SUMNER, ALBERT HOVEY.

